Gurobi 5.0.1 (linux64) logging started Fri Nov 16 16:58:39 2012 Optimize a model with 15066 rows, 6642 columns and 51516 nonzeros Presolve removed 1 rows and 81 columns Presolve time: 0.12s Presolved: 15065 rows, 6561 columns, 51497 nonzeros Variable types: 0 continuous, 6561 integer (6561 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 2.000000e+00, 7438 iterations, 0.52 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 160 50.00000 2.00000 96.0% - 3s H 0 0 12.0000000 2.00000 83.3% - 3s H 0 0 5.0000000 2.00000 60.0% - 4s 0 0 2.00000 0 160 5.00000 2.00000 60.0% - 6s H 0 0 4.0000000 2.00000 50.0% - 6s 0 0 2.00000 0 160 4.00000 2.00000 50.0% - 16s 0 0 2.00000 0 160 4.00000 2.00000 50.0% - 27s 0 0 2.00000 0 160 4.00000 2.00000 50.0% - 39s 0 0 2.00000 0 160 4.00000 2.00000 50.0% - 51s 0 0 2.00000 0 160 4.00000 2.00000 50.0% - 62s 0 2 2.00000 0 160 4.00000 2.00000 50.0% - 96s 1 3 2.50000 1 1014 4.00000 2.00000 50.0% 53602 110s 2 4 2.50000 1 956 4.00000 2.50000 37.5% 42927 123s 12 5 2.50000 2 156 4.00000 2.50000 37.5% 7743 125s 41 8 2.50000 3 159 4.00000 2.50000 37.5% 2719 130s 86 13 3.00000 4 148 4.00000 3.00000 25.0% 1527 136s 116 11 3.00000 7 132 4.00000 3.00000 25.0% 1166 140s 143 10 3.00000 7 141 4.00000 3.00000 25.0% 971 150s Cutting planes: Clique: 84 Explored 234 nodes (295156 simplex iterations) in 150.93 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%